| | Luray, SC | Barnwell, SC | United States |
| Population | 91 | 4,526 | 329,725,481 |
| Female Population | 46.2% | 56.2% | 50.5% |
| Male Population | 53.9% | 43.8% | 49.5% |
| Median Age | 45.4 | 32.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 127 | 4,764 | 309,327,143 |
| Population - 2000 | 115 | 5,035 | 285,036,114 |
| Population - 1990 | 102 | 5,255 | 251,960,433 |
| Pop. 2000 to Now | 0.9% | -15.4% | 15.6% |
| Pop. 1990 to Now | 13.7% | -18.9% | 30.8% |
| space4 | | | |
| Population Density | 88.1 | 577.2 | 93.4 |
| Land Area | 1.0 | 7.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Luray, SC | Barnwell, SC | United States |
| Age 0 to 4 | 0.0% | 7.9% | 5.9% |
| Age 5 to 9 | 0.0% | 7.4% | 6.1% |
| Age 10 to 14 | 0.0% | 7.4% | 6.6% |
| Age 15 to 17 | 9.9% | 2.5% | 3.9% |
| Age 18 to 20 | 8.8% | 7.4% | 4.0% |
| Age 21 to 24 | 5.5% | 8.4% | 5.2% |
| Age 25 to 34 | 15.4% | 11.8% | 13.8% |
| Age 35 to 44 | 8.8% | 9.4% | 12.9% |
| Age 45 to 54 | 38.5% | 12.3% | 12.6% |
| Age 55 to 59 | 1.1% | 5.0% | 6.7% |
| Age 60 to 64 | 3.3% | 4.9% | 6.3% |
| Age 65 to 74 | 4.4% | 8.0% | 9.6% |
| Age 75 to 84 | 1.1% | 5.2% | 4.5% |
| Age 85 and over | 3.3% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Luray, SC | Barnwell, SC | United States |
| White | 22.0% | 40.9% | 59.4% |
| Black | 42.9% | 57.6% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 0.0% | 0.4% | 3.2% |
| Hispanic | 35.2% | 0.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Luray, SC | Barnwell, SC | United States |
| Married Population | 57.1% | 29.6% | 49.8% |
| Currently Married | 56.0% | 26.3% | 48.0% |
| Married but Separated | 1.1% | 3.3% | 1.8% |
| Single Population | 42.9% | 70.4% | 50.2% |
| Never Married | 34.1% | 49.6% | 33.8% |
| Divorced | 5.5% | 12.0% | 10.8% |
| Widowed | 3.3% | 8.8% | 5.6% |
| space5 | | | |
| Household Size | 3.03 | 2.40 | 2.60 |
| Households | 30 | 1,819 | 124,010,992 |
| Family Households | 24 | 968 | 80,755,759 |
| Married couple, w/children | 20.8% | 17.7% | 30.5% |
| Married couple, no children | 45.8% | 25.6% | 42.9% |
| Non Family Households | 6 | 851 | 43,255,233 |
| Single householder, w/children | 16.7% | 32.0% | 15.8% |
| Single householder, no children | 16.7% | 24.7% | 10.8% |